Correspondence between William Henry McDougall and his sister Gertrude runs from 1926 to 1949 with some undated letters included. There are only two letters from McDougall to Gertrude, both from 1926. There are no letters from 1936 or 1937 and only one each from 1938, 1939 and 1949. The letters are concerned with family, school, jobs and other personal items.

Two letters from Paul Carrico, McDougall's brother-in-law, one to McDougall and one to his parents. The letter of 7 March 1939 is about plans for Carrico's wedding to Gertrude in August. The other, undated letter is to inform Mr. and Mrs. McDougall about Gertrude's health following an operation.

"Auntie," McDougall's mother's older sister, to McDougall.

Gertrude to "Fannie," her sister, Frances May Tormey McDougall.

"Rollie" to "Grandma," Mary Lavine Carl Tormey, and to William Henry McDougall about his job.

Teresa to her mother, Mary Lavine Carl Tormey, about family events. These letters were enclosed in letters to Frances May Tormey McDougall.

George, brother to Frances McDougall, to his nephew, "Bill," about family and personal items.

Hayden to McDougall about the legal aspects of Gertrude G. Tormey Carr's accident at the Catholic church. Also included is a letter from Gertrude to Hayden.

"Grandma," to William Henry McDougall.

"Mother," to "Fannie," Frances McDougall.

Letters to Gertrude G. Tormey car from "Mabel" and "Will" and two letters from "Aunt Marg" to McDougall.